How to Hide the "Ehavior heatmaps" Admin Menu

function plt_hide_ehavior_website_heatmaps_menus() {
	//Hide the "Settings → Ehavior heatmaps" menu.
	remove_submenu_page('options-general.php', 'EhaviorClick');
}

add_action('admin_menu', 'plt_hide_ehavior_website_heatmaps_menus', 11);

Where do I put this code?